Innovators West 10% Overdrive 10-Rib Harmonic Balancer & 6 Rib Accessory Drive for Corvette, Pontiac G8 and CTS-V

The double keyway option requires that the factory or aftermarket crankshaft be removed from the engine and a second keyway cut into the snout of the crankshaft. DO NOT run a double keyed damper on a crankshaft without the double keys. Failure to the damper hub can happen without the supporting key in the broached keyway slot. The dual keyway option is for Supercharged or Extreme Duty Applications (typically over 750 rwhp). Without the double key modification your crankshaft in these high horsepower applications can lead to the failure of the damper hub and/or the single keyway which results in damage to the damper and the crankshaft snout.

#966 Crankshaft Pin Kit for Corvette LS1/2/3/6 Engines. Will not work with LS7 engine. Designed for use with Innovators West dampers. For Stock Crankshafts Only.

Conversion Kit Includes: Harmonic Balancer, P/S, Alt, Smooth Idler & Ribbed Tensioner Pulleys

The super duty hub has increased material for supercharged applications.This increased material helps to protect the hub from cracking in high load applications. The super duty hub is recommended for supercharged applications making over 750 rwhp. Includes matching timing cover oil seal.